Raidcall is a free lightweight voice-chat software of the future generation.RaidCall is mainly used by gamers to communicate and cooperate within games. You may find different useful add-ons specifically built for various games. Offering premium audio quality and minimum delay, Raidcall is your perfect companion for an fully-interactive gaming experience.

Raidcall uses the Client-Server Model to transfer data, rather than using the P2P Model such as Skype, which takes up more bandwidth from user. When user is talking in this Client-Server model, RaidCall sends one stream of data to the RaidCall server , then the server broadcasts it to other users in the same channel. Hence it requires very little bandwidth for voice communication and support more than 1000 slots per channel.

Features:
1. Absolutely Free
Raidcall is an audio service based on Cloud-computing. Both the client and server software are free for all normal users (non-commercial). You can save money on server rental fee, and save time from sophisticated configurations.
2. Powerful Overlay
Raidcall Overlay is a built-in Flash-based engine which enables you to freely use Raidcall within any game. You may chat, talk, and even watch walkthrough videos without ever having to leave the game.

3. Social Network
You can meet plenty of new friends in the Raidcall network, or use Raidcall to track down your buddies.

4. Crisp & Smooth Audio Quality
Raidcall relies on the most popular and powerful audio-engine, Speex, to effectively reduce noise and promote audio quality. Raidcall offers near-perfect audio communication within your game.

5. Minimum Latency
Raidcall utilizes UDP as communication protocol, therefore significantly shortens delay when compared to the TCP Protocol used by other VoiP systems. With advanced packet recovery algorithm, Raidcall offers real-time voice-chat for your game, allowing your team to communicate with greater efficiency and precision.

6. Light & Fast
Raidcall is swift and light. The installation file is only 1.5MB. The software only takes up 10MB of RAM and 0.77-1.55% of your CPU resource. Raidcall is designed to be as fast and slick as possible so your game may run smoother and faster.

7. Privacy/Authorization Schemes
Raidcall is pre-built with different Privacy Settings and Authorization Schemes that allows you to assign different authority to different characters based on channels. This feature is designed to help you to better manage your guild and team.

The license of this software is Freeware, you can free download and free use this internet phone software.